EP0848306B1 - Time piece having an electric energy generator - Google Patents

Time piece having an electric energy generator Download PDF

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Publication number
EP0848306B1
EP0848306B1 EP19960119747 EP96119747A EP0848306B1 EP 0848306 B1 EP0848306 B1 EP 0848306B1 EP 19960119747 EP19960119747 EP 19960119747 EP 96119747 A EP96119747 A EP 96119747A EP 0848306 B1 EP0848306 B1 EP 0848306B1
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Prior art keywords
output terminal
generator
voltage
diode
timepiece
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EP19960119747
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German (de)
French (fr)
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EP0848306A1 (en
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Pierre-André Farine
Ermanno Bernasconi
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Asulab AG
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Asulab AG
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Priority to EP19960119747 priority Critical patent/EP0848306B1/en
Priority to DE1996609618 priority patent/DE69609618T2/en
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    • GPHYSICS
    • G04HOROLOGY
    • G04CELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00Arrangements of electric power supplies in time pieces

Definitions

  • the present invention relates to a part electronic watchmaking and, in particular, to such room in which electrical energy is generated by a generator driven by a spring barrel.
  • a timepiece with these characteristics which is described for example in the patent application Swiss no. 686 332, has the same precision as a part classic electronic watchmaking thanks to the fact that reference pulses, the frequency of which determines the rotational speed of the generator rotor and therefore that display hands for the current time, are produced from a signal supplied by an oscillator at quartz.
  • this timepiece does not contain battery or accumulator since the supply of its electronic circuits is provided by energy electric supplied by its generator whose rotor is connected to its mechanical energy source, which is made up by a barrel spring similar to that which is used in mechanical timepieces classics.
  • braking means of the generator rotor consist of a resistor connected in series with a switch electronics, the whole formed by this resistance and this switch being connected in parallel with the coil the generator.
  • this switch is controlled directly by the comparison signal so as to be closed regularly when the latter is in its first state, i.e. as long as the generator rotor is ahead of the position he would occupy if he had always been running at its set speed.
  • Electronic circuits of the timepiece are supplied by a DC voltage supplied by a rectification circuit of the alternating voltage produced by the generator.
  • the rotor of the generator can be braked continuously for one quite long time. It is therefore practically excluded from choose a zero value for the braking resistor, because the rectifier circuit capacitor should then have a very high capacity and therefore should be enough bulky and expensive. Besides, it would not be possible to determine with certainty the ability that this capacitor should have since the maximum time during which the generator rotor can be braked does not cannot be planned in advance.
  • the voltage alternative produced by this coil is decreased by one because of the decrease in rotation speed which results from this connection and, on the other hand, because of the voltage drop produced in the generator coil by the current absorbed by the braking resistor.
  • the braking torque applied to the rotor of the generator is higher as the value of the braking resistance is low, this braking torque being maximum when this braking resistor has a null value.
  • This braking torque must obviously impose on the generator rotor a rotation speed lower than its target speed regardless of the engine torque supplied by the barrel spring.
  • this engine torque can be as high as possible, which influences favorably the autonomy of the timepiece, i.e. the time during which it can operate without that its barrel spring must be reassembled, it is necessary so that the braking torque is also high, this which implies that the braking resistor has a value low.
  • this resistance should have a null value.
  • the rotor braking resistor must therefore fill two contradictory conditions. On the one hand, it must be high enough, and in any case not zero, to that the supply voltage of electronic circuits is sufficient in all circumstances. On the other hand, it must be low enough, and preferably zero, to the braking torque is high and the speed of rotor rotation, when braked, less than its set speed even when the engine torque provided by the mechanical energy source is maximum.
  • a coil having a large number of turns of a small diameter wire has a high internal resistance which, on the one hand, is added to the braking resistor and decreases the torque by braking of the rotor and, on the other hand, causes a decrease in the alternating voltage produced by the generator when the current supplied by the latter.
  • An object of the present invention is to provide a timepiece of the same kind as that described above but which does not have the disadvantages of this one, that is to say a timepiece in which the value of the rotor braking resistor may be very weak, or even zero, without being necessary to give the generator coil a high number of turns and without the risk of see, in any circumstance whatsoever, the tension supply of electronic circuits become insufficient for these to work correctly. Also, this very low value, or even zero, this braking resistor allows you to choose the barrel spring driving the rotor of the generator so that its maximum torque is high and that the autonomy of the timepiece is therefore more high, all other things being equal, than that of the known timepiece mentioned above.
  • the invention therefore relates to a timepiece comprising a barrel, a spring housed in this barrel, time display devices mechanically coupled to this barrel, a generator of electrical energy coupled also mechanically to the barrel and being arranged at deliver through first and second terminals of output an alternating voltage, a rectification circuit connected to the first and second output terminals of the generator by two respective input terminals and being arranged to deliver through two output terminals one DC voltage from said AC voltage, and a regulator circuit supplied by the DC voltage and intended to control the speed of rotation of the generator so as to impose on the display organs a rotation speed corresponding to an indication correct for the current time.
  • the timepiece is characterized in that the rectification circuit comprises a voltage doubler rectifier, connected to the first and second generator output terminals and being arranged to deliver through a first output terminal and a second output terminal a DC voltage of so the potential at this first output terminal be greater than the potential of this second terminal of output, a first capacitor and a first diode connected in series between the first output terminal of said voltage doubler rectifier and the first terminal of output of said generator, the first diode being oriented so as to allow the circulation of a current from the first rectifier output terminal voltage doubler at the first output terminal of the generator, and a second capacitor and a second diode connected in series between the first output terminal of the generator and the second output terminal of the voltage doubling rectifier, the second diode being oriented so as to allow the circulation of a current from the first generator output terminal to the second output terminal of the doubling rectifier voltage.
  • the rectification circuit comprises a voltage doubler rectifier, connected to the first and second generator output terminals and being arranged to deliver through
  • the rectification circuit is arranged to multiply the supply voltage by a even factor of at least four without requiring a number high bulky items. So the room timepieces according to the invention can have a value of the rotor braking resistance which is very low, without that it is necessary to give the coil of the generating a high number of turns and without there being a risk of seeing, under any circumstances whatsoever, the supply voltage of electronic circuits become insufficient for these to work correctly.
  • Figure 1 represents a simplified general diagram of a part of watchmaking according to the invention. It should be noted that the part of this diagram concerning the regulator circuit intended to control the speed of rotation of the generator of this timepiece, will not described in detail here, the skilled person can without hardly build this slaving device while referring to the description of the Swiss patent application No 686 332 in the name of the Applicant patent application. However, to make it easier understanding of the present invention, it will be recalled briefly here the essential elements of the diagram and operation of this regulator circuit.
  • the timepiece according to the invention comprises a mechanical energy source formed by a barrel 1 housing a spring 1a of the usual type in the art watchmaking, with manual or automatic winding.
  • Barrel 1 is mechanically coupled to rotor 2a an electric generator 2 via a gear train 3 symbolized by mixed lines.
  • Generator 2 includes a coil 2b at terminals B1 and B2 from which an alternating voltage is generated Ug, when the rotor 2a is rotated, this rotor being the bearer of one or more permanent magnet (s) generating a magnetic field symbolized by an arrow in Figure 1 and with which the coil 2b is coupled.
  • the terminals B1 and B2 of the coil 2b are connected to a rectifier 4 whose output terminals 4a and 4b provide a continuous voltage Ua derived from the voltage Ug alternative and intended to supply the various circuits of the timepiece.
  • Needles 5 or any other conventional means mechanical time display are coupled to the train gear 3 to allow time display current and possibly date and day and other time indications.
  • the rotation speed of the hands 5 is maintained at a constant average value thanks to a circuit regulator 6 which controls this value at a speed of setpoint Vc.
  • the regulator circuit components 6 are designed to adjust the speed of rotation of the rotor 2a, so that the 5 hands rotate at the required indication speed just an hour, when the rotor turns at the speed of setpoint Vc. This is for example seven turns per second.
  • the servo circuit 6 includes an oscillator 7 stabilized by a watchmaking type quartz and a divider of frequency 8 reducing the frequency of this oscillator to a value usable by a functional block 9 which controls the grid of a semiconductor component 10, by example an n type MOS transistor.
  • This semiconductor component when it is made conductive, allows to short-circuit this coil and thus have a braking effect on the movement of generator rotation 2.
  • the brake control signal SF which circulates on a line 11 between the functional block 9 and the grid of the semiconductor component 10 is of logic type and in the example shown, we admit that this signal is in the state logic "0" as long as the timepiece delays, that is to say as long as the average speed of the rotor 2a is lower than the set speed Vc. In these conditions, the component or transistor 10 remains blocked and the rotor 2a is not braked.
  • the brake control signal SF is made up of pulses of determined duration starting at the start of each alternation, for example positive, of the Ug voltage at terminals B1 and B2 of coil 2b. during each of these pulses of the control signal SF, this one is in state "1" making the transistor 10 conductive and braking the rotor 2a.
  • FIG. 2 illustrates an embodiment according to the invention of the rectifier circuit shown in Figure 1.
  • the rectifying circuit 4 comprises a rectifier voltage doubler 20, two diodes 21 and 22 and two capacitors 23 and 24.
  • the voltage doubling rectifier 20 which is connected to the output terminals B1 and B2 of the generator, is arranged to deliver through two output terminals 20a and 20b a DC voltage Us so that the potential at the first output terminal 20a is greater than that of said second output terminal 20b.
  • the voltage doubler rectifier 20 includes a capacitor 27 and a diode 25 connected in series between the first terminal B2 and the second output terminal B1 of the generator 2.
  • the diode 25 is oriented so that allow circulation of the first B2 exit terminal to the second output terminal B1 of generator 2.
  • the voltage doubling rectifier 20 includes a capacitor 28 and a diode 26 connected at series between the first output terminal B2 and the second output terminal B1 of generator 2.
  • Diode 26 is oriented so as to allow circulation of the second output terminal B1 at the first output terminal B2 of generator 2.
  • the anode of diode 25 is connected to the terminal of output of the voltage doubling rectifier 20a, while the cathode of diode 26 is connected to the output terminal of the voltage doubling rectifier 20b.
  • the diodes 21, 22, 25 and 26 are preferably Schottky type or active type to limit loss of tension during their direct conduction.
  • the voltage Us across the terminals of output 20a and 20b of the voltage doubler rectifier 20 is a DC voltage which has a value equivalent to Uc1 + Uc2 ⁇ 2Ug (if one neglects the losses of tension through diodes 25 and 26).
  • the diode 21 and the capacitor 23 are connected in series between the output terminal 20a of the doubling rectifier of voltage 20 and the output terminal B2 of the generator 2.
  • the diode 22 and the capacitor 24 are connected in series between the output terminal 20b of the rectifier voltage doubler 20 and the output terminal B2 of the generator 2.
  • the diode 21 is oriented so that allow the circulation of a current from the terminal output 20a of the voltage doubler rectifier 20 at the terminal B2 of generator 2, while diode 22 is oriented so as to allow the flow of a current from the terminal B2 of generator 2 to output terminal 20b of voltage doubler rectifier 20.
  • the voltage Ua across the terminals output 4a and 4b of the rectification circuit is a direct voltage which has a value equivalent to Uc3 + Uc4 ⁇ 4Ug.
  • the arrangement shown in figure 2 has the advantage of requiring less AC voltage of generator 2. Therefore, generator 2 can be carried out with a smaller number of turns, which implies a lower manufacturing price.
  • the rectification circuit 4 of the figure 2 does not require a large number of elements bulky. It can be seen in FIG. 2 that the capacitors 23 and 24 supply, across the terminals 4b and 4a, significant energy on the circuits of the timepiece, while the capacitors 27 and 28 are sort of used to transfer a load generated by generator 2 to capacitors 23 and 24. So, capacitors 27 and 28 do not need a large capacity and, in practical achievements carried out as part of the present invention, can even be integrated with electronic circuits.
  • the capacitors 23 and 24 have each 2200 nF, while the capacitors 27 and 28 each have a value of only 100 nF. Of preferably, capacitors 27 and 28 have a capacity between 100 and 100 nF and the capacitors 23 and 24 have a capacity between 100 and 100 nF, a capacity 29 between 4a and 4b having 2200 nF.

Description

La présente invention est relative à une pièce d'horlogerie électronique et, en particulier, à une telle pièce dans laquelle l'énergie électrique est engendrée par une génératrice mue par un barillet à ressort.The present invention relates to a part electronic watchmaking and, in particular, to such room in which electrical energy is generated by a generator driven by a spring barrel.

Une pièce d'horlogerie ayant ces caractéristiques, qui est décrite par exemple dans la demande de brevet suisse no. 686 332, a la même précision qu'une pièce d'horlogerie électronique classique grâce au fait que les impulsions de référence, dont la fréquence détermine la vitesse de rotation du rotor du générateur et donc celle des aiguilles d'affichage de l'heure courante, sont produites à partir d'un signal fourni par un oscillateur à quartz.A timepiece with these characteristics, which is described for example in the patent application Swiss no. 686 332, has the same precision as a part classic electronic watchmaking thanks to the fact that reference pulses, the frequency of which determines the rotational speed of the generator rotor and therefore that display hands for the current time, are produced from a signal supplied by an oscillator at quartz.

En outre, cette pièce d'horlogerie ne comporte ni pile ni accumulateur puisque l'alimentation de ses circuits électroniques est assurée par l'énergie électrique fournie par sa génératrice dont le rotor est relié à sa source d'énergie mécanique, qui est constituée par un ressort de barillet semblable à celui qui est utilisé dans les pièces d'horlogerie mécaniques classiques.In addition, this timepiece does not contain battery or accumulator since the supply of its electronic circuits is provided by energy electric supplied by its generator whose rotor is connected to its mechanical energy source, which is made up by a barrel spring similar to that which is used in mechanical timepieces classics.

Ceci représente un net avantage par rapport à une pièce d'horlogerie électronique classique dont les circuits sont alimentés par une pile ou un accumulateur dont la durée de vie est limitée.This is a clear advantage over a classic electronic timepiece whose circuits are powered by a battery or accumulator whose lifespan is limited.

Dans la pièce d'horlogerie décrite dans la demande de brevet suisse mentionnée ci-dessus, les moyens de freinage du rotor de la génératrice sont constitués par une résistance branchée en série avec un interrupteur électronique, l'ensemble formé par cette résistance et cet interrupteur étant branché en parallèle avec la bobine de la génératrice. In the timepiece described in the request for Swiss patent mentioned above, braking means of the generator rotor consist of a resistor connected in series with a switch electronics, the whole formed by this resistance and this switch being connected in parallel with the coil the generator.

En outre, cet interrupteur est commandé directement par le signal de comparaison de manière à être fermé régulièrement lorsque ce dernier est dans son premier état, c'est-à-dire tant que le rotor de la génératrice est en avance par rapport à la position qu'il occuperait s'il avait toujours tourné à sa vitesse de consigne.In addition, this switch is controlled directly by the comparison signal so as to be closed regularly when the latter is in its first state, i.e. as long as the generator rotor is ahead of the position he would occupy if he had always been running at its set speed.

Il peut donc arriver que ce rotor soit freiné sans interruption pendant un temps assez long, notamment s'il a été auparavant fortement accéléré par un choc angulaire.It can therefore happen that this rotor is braked without interruption for a fairly long time, especially if it has previously been strongly accelerated by an angular shock.

Les circuits électroniques de la pièce d'horlogerie sont alimentés par une tension continue fournie par un circuit de redressement de la tension alternative produite par la génératrice.Electronic circuits of the timepiece are supplied by a DC voltage supplied by a rectification circuit of the alternating voltage produced by the generator.

La valeur de cette tension continue, qui dépend de la valeur de cette tension alternative, doit évidemment être en permanence suffisante pour que ces circuits électroniques fonctionnent correctement.The value of this DC voltage, which depends on the value of this AC voltage, must obviously be permanently sufficient for these circuits electronics work properly.

Or, lorsque le rotor du générateur est freiné, la tension alternative qu'il produit est d'autant plus basse que la valeur de la résistance de freinage est faible, cette tension alternative étant évidemment nulle si la valeur de la résistance de freinage est elle-même nulle.However, when the generator rotor is braked, the the alternating voltage it produces is even lower that the value of the braking resistor is low, this AC voltage obviously being zero if the value of the braking resistor is itself zero.

Si le rotor du générateur n'était freiné que pendant des temps relativement courts, les circuits électroniques de la pièce d'horlogerie pourraient être alimentés, pendant ces temps de freinage, par l'énergie électrique accumulée dans le ou les condensateurs que comporte généralement le circuit de redressement alimentant ces circuits, et ceci même si la valeur de la résistance de freinage était nulle.If the generator rotor was only braked for relatively short times, electronic circuits of the timepiece could be powered, during these braking times, by electrical energy accumulated in the capacitor (s) generally the rectification circuit supplying these circuits, even if the resistance value of braking was zero.

Mais, comme on l'a vu ci-dessus, le rotor du générateur peut être freiné sans interruption pendant un temps assez long. Il est donc pratiquement exclu de choisir pour la résistance de freinage une valeur nulle, car le condensateur du circuit redresseur devrait alors avoir une capacité très élevée et devrait donc être assez encombrant et cher. Il ne serait d'ailleurs pas possible de déterminer avec certitude la capacité que ce condensateur devrait avoir puisque le temps maximal pendant lequel le rotor du générateur peut être freiné ne peut pas être prévu à l'avance.But, as we saw above, the rotor of the generator can be braked continuously for one quite long time. It is therefore practically excluded from choose a zero value for the braking resistor, because the rectifier circuit capacitor should then have a very high capacity and therefore should be enough bulky and expensive. Besides, it would not be possible to determine with certainty the ability that this capacitor should have since the maximum time during which the generator rotor can be braked does not cannot be planned in advance.

Lorsque la résistance de freinage est branchée en parallèle avec la bobine du générateur, la tension alternative produite par cette bobine est diminuée d'une part à cause de la diminution de la vitesse de rotation qui résulte de ce branchement et, d'autre part, à cause de la chute de tension produite dans la bobine du générateur par le courant absorbé par la résistance de freinage.When the braking resistor is connected in parallel with the generator coil, the voltage alternative produced by this coil is decreased by one because of the decrease in rotation speed which results from this connection and, on the other hand, because of the voltage drop produced in the generator coil by the current absorbed by the braking resistor.

Il en résulte que, pour que la tension d'alimentation des circuits électroniques de la pièce d'horlogerie soit toujours suffisante, il ne suffit pas que la valeur de la résistance de freinage ne soit pas nulle, comme on l'a vu ci-dessus, mais il faut en outre que cette valeur soit relativement élevée.As a result, in order for the supply voltage electronic circuits of the timepiece either always sufficient it is not enough that the value of the braking resistance is not zero, as we have seen above, but this value must also be relatively high.

Cependant, le couple de freinage appliqué au rotor du générateur est d'autant plus élevé que la valeur de la résistance de freinage est faible, ce couple de freinage étant maximal lorsque cette résistance de freinage a une valeur nulle.However, the braking torque applied to the rotor of the generator is higher as the value of the braking resistance is low, this braking torque being maximum when this braking resistor has a null value.

Ce couple de freinage doit évidemment imposer au rotor du générateur une vitesse de rotation inférieure à sa vitesse de consigne quel que soit le couple moteur fourni par le ressort de barillet.This braking torque must obviously impose on the generator rotor a rotation speed lower than its target speed regardless of the engine torque supplied by the barrel spring.

Pour que la valeur maximale de ce couple moteur puisse être aussi élevée que possible, ce qui influence favorablement l'autonomie de la pièce d'horlogerie, c'est-à-dire le temps pendant lequel elle peut fonctionner sans que son ressort de barillet doive être remonté, il faut donc que le couple de freinage soit également élevé, ce qui implique que la résistance de freinage ait une valeur faible. De préférence, cette résistance devrait avoir une valeur nulle.So that the maximum value of this engine torque can be as high as possible, which influences favorably the autonomy of the timepiece, i.e. the time during which it can operate without that its barrel spring must be reassembled, it is necessary so that the braking torque is also high, this which implies that the braking resistor has a value low. Preferably, this resistance should have a null value.

La résistance de freinage du rotor doit donc remplir deux conditions contradictoires. D'une part, elle doit être suffisamment élevée, et en tout cas pas nulle, pour que la tension d'alimentation des circuits électroniques soit suffisante en toutes circonstances. D'autre part, elle doit être assez faible, et de préférence nulle, pour que le couple de freinage soit élevé et que la vitesse de rotation du rotor, lorsqu'il est freiné, soit inférieure à sa vitesse de consigne même lorsque le couple moteur fourni par la source d'énergie mécanique est maximal.The rotor braking resistor must therefore fill two contradictory conditions. On the one hand, it must be high enough, and in any case not zero, to that the supply voltage of electronic circuits is sufficient in all circumstances. On the other hand, it must be low enough, and preferably zero, to the braking torque is high and the speed of rotor rotation, when braked, less than its set speed even when the engine torque provided by the mechanical energy source is maximum.

Pour que la première condition ci-dessus puisse être remplie plus facilement, on peut théoriquement augmenter le nombre de spires de la bobine du générateur. Mais une bobine ayant un grand nombre de spires est volumineuse et peut être difficile à loger dans l'espace restreint disponible dans une pièce d'horlogerie de petit volume telle qu'une montre bracelet. Ou alors, si on choisit de réaliser cette bobine avec un fil de diamètre suffisamment faible pour qu'elle ne soit pas trop encombrante, sa fabrication devient difficile et son prix de revient augmente.So that the first condition above can be filled more easily, we can theoretically increase the number of turns of the generator coil. But one coil having a large number of turns is bulky and can be difficult to accommodate in tight space available in a small volume timepiece such as a wristwatch. Or if we choose to make this coil with a wire of sufficient diameter low so that it is not too bulky, its manufacturing becomes difficult and its cost price increases.

Il faut aussi tenir compte du fait qu'une bobine ayant un grand nombre de spires d'un fil de petit diamètre a une résistance interne élevée qui, d'une part, s'ajoute à la résistance de freinage et diminue le couple de freinage du rotor et, d'autre part, provoque une diminution de la tension alternative produite par le générateur lorsqu'elle est parcourue par le courant fourni par ce dernier.It should also be taken into account that a coil having a large number of turns of a small diameter wire has a high internal resistance which, on the one hand, is added to the braking resistor and decreases the torque by braking of the rotor and, on the other hand, causes a decrease in the alternating voltage produced by the generator when the current supplied by the latter.

Pour que la deuxième condition mentionnée ci-dessus soit plus facilement remplie, on peut évidemment diminuer la valeur maximale du couple moteur fourni par le ressort de barillet entraínant le rotor du générateur. Mais alors l'autonomie de la pièce d'horlogerie est diminuée, ce qui n'est évidemment pas souhaitable.In order for the second condition mentioned above is more easily filled, we can obviously decrease the maximum value of the motor torque supplied by the spring barrel driving the generator rotor. But then the autonomy of the timepiece is reduced, which is obviously not desirable.

Un but de la présente invention est de proposer une pièce d'horlogerie du même genre que celle qui est décrite ci-dessus mais qui ne présente pas les inconvénients de celle-ci, c'est-à-dire une pièce d'horlogerie dans laquelle la valeur de la résistance de freinage du rotor peut être très faible, voire même nulle, sans qu'il soit nécessaire de donner à la bobine de la génératrice un nombre de spires élevé et sans qu'il y ait un risque de voir, en quelque circonstance que ce soit, la tension d'alimentation des circuits électroniques devenir insuffisante pour que ces derniers fonctionnent correctement. En outre, cette valeur très faible, ou même nulle, de cette résistance de freinage permet de choisir le ressort de barillet entraínant le rotor de la génératrice de manière que son couple maximal soit élevé et que l'autonomie de la pièce d'horlogerie soit donc plus élevée, toutes autres choses étant égales, que celle de la pièce d'horlogerie connue mentionnée ci-dessus.An object of the present invention is to provide a timepiece of the same kind as that described above but which does not have the disadvantages of this one, that is to say a timepiece in which the value of the rotor braking resistor may be very weak, or even zero, without being necessary to give the generator coil a high number of turns and without the risk of see, in any circumstance whatsoever, the tension supply of electronic circuits become insufficient for these to work correctly. Also, this very low value, or even zero, this braking resistor allows you to choose the barrel spring driving the rotor of the generator so that its maximum torque is high and that the autonomy of the timepiece is therefore more high, all other things being equal, than that of the known timepiece mentioned above.

L'invention a donc pour objet une pièce d'horlogerie comprenant un barillet, un ressort logé dans ce barillet, des organes d'affichage de l'heure couplés mécaniquement à ce barillet, une génératrice d'énergie électrique couplée également mécaniquement au barillet et étant agencée à délivrer à travers des première et deuxième bornes de sortie une tension alternative, un circuit de redressement connecté aux première et deuxième bornes de sortie de la génératrice par deux bornes d'entrée respectives et étant agencé à délivrer à travers deux bornes de sortie une tension continue à partir de ladite tension alternative, et un circuit régulateur alimenté par la tension continue et destiné à asservir la vitesse de rotation de la génératrice de manière à imposer aux organes d'affichage une vitesse de rotation correspondant à une indication correcte de l'heure courante. La pièce d'horlogerie est caractérisée en ce que le circuit de redressement comprend un redresseur doubleur de tension, connecté aux première et deuxième bornes de sortie de la génératrice et étant agencé à délivrer à travers une première borne de sortie et une deuxième borne de sortie une tension continue de sorte que le potentiel à cette première borne de sortie soit supérieur au potentiel de cette deuxième borne de sortie, un premier condensateur et une première diode reliés en série entre la première borne de sortie dudit redresseur doubleur de tension et la première borne de sortie de ladite génératrice, la première diode étant orientée de manière à permettre la circulation d'un courant de la première borne de sortie du redresseur doubleur de tension à la première borne de sortie de la génératrice, et un deuxième condensateur et une deuxième diode reliés en série entre la première borne de sortie de la génératrice et la deuxième borne de sortie du redresseur doubleur de tension, la deuxième diode étant orientée de manière à permettre la circulation d'un courant de la première borne de sortie de la génératrice à la deuxième borne de sortie du redresseur doubleur de tension.The invention therefore relates to a timepiece comprising a barrel, a spring housed in this barrel, time display devices mechanically coupled to this barrel, a generator of electrical energy coupled also mechanically to the barrel and being arranged at deliver through first and second terminals of output an alternating voltage, a rectification circuit connected to the first and second output terminals of the generator by two respective input terminals and being arranged to deliver through two output terminals one DC voltage from said AC voltage, and a regulator circuit supplied by the DC voltage and intended to control the speed of rotation of the generator so as to impose on the display organs a rotation speed corresponding to an indication correct for the current time. The timepiece is characterized in that the rectification circuit comprises a voltage doubler rectifier, connected to the first and second generator output terminals and being arranged to deliver through a first output terminal and a second output terminal a DC voltage of so the potential at this first output terminal be greater than the potential of this second terminal of output, a first capacitor and a first diode connected in series between the first output terminal of said voltage doubler rectifier and the first terminal of output of said generator, the first diode being oriented so as to allow the circulation of a current from the first rectifier output terminal voltage doubler at the first output terminal of the generator, and a second capacitor and a second diode connected in series between the first output terminal of the generator and the second output terminal of the voltage doubling rectifier, the second diode being oriented so as to allow the circulation of a current from the first generator output terminal to the second output terminal of the doubling rectifier voltage.

Grâce à cet agencement, le circuit de redressement est agencé à multiplier la tension d'alimentation par un facteur pair d'au moins quatre sans nécessiter un nombre élevés d'éléments encombrants. Ainsi, la pièce d'horlogerie selon l'invention peut avoir une valeur de la résistance de freinage du rotor qui est très faible, sans qu'il soit nécessaire de donner à la bobine de la génératrice un nombre de spires élevé et sans qu'il y ait un risque de voir, en quelque circonstance que ce soit, la tension d'alimentation des circuits électroniques devenir insuffisante pour que ces derniers fonctionnent correctement.Thanks to this arrangement, the rectification circuit is arranged to multiply the supply voltage by a even factor of at least four without requiring a number high bulky items. So the room timepieces according to the invention can have a value of the rotor braking resistance which is very low, without that it is necessary to give the coil of the generating a high number of turns and without there being a risk of seeing, under any circumstances whatsoever, the supply voltage of electronic circuits become insufficient for these to work correctly.

D'autres caractéristiques et avantages de l'invention apparaítront au cours de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés sur lesquels:

  • la figure 1 montre un schéma général simplifié d'une pièce d'horlogerie selon l'invention, et
  • la figure 2 est un schéma du circuit de redressement de la pièce d'horlogerie de la figure 1.
Other characteristics and advantages of the invention will become apparent during the description which follows, given solely by way of example and made with reference to the appended drawings in which:
  • FIG. 1 shows a simplified general diagram of a timepiece according to the invention, and
  • FIG. 2 is a diagram of the rectification circuit of the timepiece of FIG. 1.

On va tout d'abord se référer à la figure 1 qui représente un schéma général simplifié d'une pièce d'horlogerie selon l'invention. Il est à noter que la partie de ce schéma concernant le circuit régulateur destiné à asservir la vitesse de rotation de la génératrice de cette pièce d'horlogerie, ne sera pas décrite en détail ici, l'homme de métier pouvant sans peine construire ce dispositif d'asservissement en se référant à la description de la demande de brevet suisse No 686 332 au nom de la Demanderesse de la présente demande de brevet. Toutefois, pour rendre plus facile la compréhension de la présente invention, on rappellera brièvement ici les éléments essentiels du schéma et du fonctionnement de ce circuit régulateur.We will first refer to Figure 1 which represents a simplified general diagram of a part of watchmaking according to the invention. It should be noted that the part of this diagram concerning the regulator circuit intended to control the speed of rotation of the generator of this timepiece, will not described in detail here, the skilled person can without hardly build this slaving device while referring to the description of the Swiss patent application No 686 332 in the name of the Applicant patent application. However, to make it easier understanding of the present invention, it will be recalled briefly here the essential elements of the diagram and operation of this regulator circuit.

La pièce d'horlogerie selon l'invention comporte une source d'énergie mécanique formée par un barillet 1 logeant un ressort 1a de type usuel dans la technique horlogère, à remontage manuel ou automatique.The timepiece according to the invention comprises a mechanical energy source formed by a barrel 1 housing a spring 1a of the usual type in the art watchmaking, with manual or automatic winding.

Le barillet 1 est couplé mécaniquement au rotor 2a d'une génératrice électrique 2 par l'intermédiaire d'un train d'engrenage 3 symbolisé par des traits mixtes.Barrel 1 is mechanically coupled to rotor 2a an electric generator 2 via a gear train 3 symbolized by mixed lines.

La génératrice 2 comporte une bobine 2b aux bornes B1 et B2 de laquelle est engendrée une tension alternative Ug, lorsque le rotor 2a est entraíné en rotation, ce rotor étant porteur d'un ou plusieurs aimant(s) permanent(s) engendrant un champ magnétique symbolisé par une flèche sur la figure 1 et avec lequel la bobine 2b est couplée.Generator 2 includes a coil 2b at terminals B1 and B2 from which an alternating voltage is generated Ug, when the rotor 2a is rotated, this rotor being the bearer of one or more permanent magnet (s) generating a magnetic field symbolized by an arrow in Figure 1 and with which the coil 2b is coupled.

Les bornes B1 et B2 de la bobine 2b sont connectées à un redresseur 4 dont les bornes de sortie 4a et 4b fournissent une tension Ua continue issue de la tension alternative Ug et destinée à alimenter les divers circuits électroniques de la pièce d'horlogerie.The terminals B1 and B2 of the coil 2b are connected to a rectifier 4 whose output terminals 4a and 4b provide a continuous voltage Ua derived from the voltage Ug alternative and intended to supply the various circuits of the timepiece.

Des aiguilles 5 ou tout autre moyen classique d'affichage mécanique de l'heure, sont couplés au train d'engrenage 3 afin de permettre l'affichage de l'heure courant et éventuellement de la date et du jour et d'autres indications horaires.Needles 5 or any other conventional means mechanical time display, are coupled to the train gear 3 to allow time display current and possibly date and day and other time indications.

La vitesse de rotation des aiguilles 5 est maintenue à une valeur moyenne constante grâce à un circuit régulateur 6 qui asservit cette valeur à une vitesse de consigne Vc.The rotation speed of the hands 5 is maintained at a constant average value thanks to a circuit regulator 6 which controls this value at a speed of setpoint Vc.

Comme décrit dans la demande de brevet précitée, les composants du circuit régulateur 6 sont conçus pour régler la vitesse de rotation du rotor 2a, de manière que les aiguilles 5 tournent à la vitesse requise d'indication juste de l'heure, lorsque le rotor tourne à la vitesse de consigne Vc. Celle-ci est par exemple de sept tours par seconde.As described in the aforementioned patent application, the regulator circuit components 6 are designed to adjust the speed of rotation of the rotor 2a, so that the 5 hands rotate at the required indication speed just an hour, when the rotor turns at the speed of setpoint Vc. This is for example seven turns per second.

Le circuit d'asservissement 6 comporte un oscillateur 7 stabilisé par un quartz de type horloger et un diviseur de fréquence 8 ramenant la fréquence de cet oscillateur à une valeur utilisable par un bloc fonctionnel 9 qui commande la grille d'un composant semi-conducteur 10, par exemple un transistor MOS de type n.The servo circuit 6 includes an oscillator 7 stabilized by a watchmaking type quartz and a divider of frequency 8 reducing the frequency of this oscillator to a value usable by a functional block 9 which controls the grid of a semiconductor component 10, by example an n type MOS transistor.

Ce dernier est branché par son circuit principal aux bornes B1 et B2 de la bobine 2b de la génératrice 2. Par conséquent, ce composant semi-conducteur lorsqu'il est rendu conducteur, permet de court-circuiter cette bobine et d'avoir ainsi un effet de freinage sur le mouvement de rotation de la génératrice 2.The latter is connected by its main circuit to terminals B1 and B2 of the coil 2b of the generator 2. By Therefore, this semiconductor component when it is made conductive, allows to short-circuit this coil and thus have a braking effect on the movement of generator rotation 2.

Les caractéristiques constructives ainsi que les fonctionnalités des divers éléments que l'on vient de décrire sont conçus de telle façon que (i) la vitesse moyenne de rotation du rotor 2a soit supérieure à la vitesse de consigne Vc, tant que le ressort de barillet 1a n'est pas presque complètement désarmé, à condition que la bobine 2b ne soit pas court-circuitée par le composant semi-conducteur 10, et que (ii) cette vitesse moyenne de rotation soit inférieure à la vitesse de consigne Vc, si la bobine 2a est court-circuitée et ce même lorsque le ressort de barillet 1a est complètement remonté et que le couple moteur qu'il fournit, a une valeur maximale.The constructive characteristics as well as the functionality of the various elements that we just describe are designed in such a way that (i) the speed average rotation of the rotor 2a is greater than the set speed Vc, as long as the barrel spring 1a is not almost completely disarmed, provided that the coil 2b is not short-circuited by the component semiconductor 10, and that (ii) this average speed of rotation is less than the set speed Vc, if coil 2a is short-circuited even when the barrel spring 1a is completely wound up and the engine torque it provides, has a maximum value.

On notera par ailleurs que dans le cadre de la présente invention, les éléments et fonctionnalités brièvement énumérés ci-dessus pourraient être réalisés éventuellement d'autres façons que celle décrite dans la demande de brevet précitée, pourvu que la vitesse de rotation de la génératrice soit régulée correctement comme indiqué ci-dessus. Cette régulation doit donc être faite en fonction de la vitesse de consigne Vc requise (déterminée par l'indication correcte de l'heure par les aiguilles 5) par l'intermédiaire de freinages successifs de la génératrice 2 dus à des mises en court-circuit répétées de la bobine 2b de cette dernière.It should also be noted that within the framework of the present invention, the elements and functionalities briefly listed above could be achieved possibly other ways than that described in the aforementioned patent application, provided that the speed of generator rotation is regulated correctly as indicated above. This regulation must therefore be made as a function of the setpoint speed Vc required (determined by the correct indication of the time by the needles 5) through successive braking of generator 2 due to short-circuits repeated from coil 2b thereof.

Le signal de commande de freinage SF qui circule sur une ligne 11 entre le bloc fonctionnel 9 et la grille du composant semi-conducteur 10 est de type logique et dans l'exemple représenté, on admet que ce signal est à l'état logique "0" tant que la pièce d'horlogerie retarde, c'est-à-dire tant que la vitesse moyenne du rotor 2a est inférieure à la vitesse de consigne Vc. Dans ces conditions, le composant ou transistor 10 reste bloqué et le rotor 2a n'est pas freiné.The brake control signal SF which circulates on a line 11 between the functional block 9 and the grid of the semiconductor component 10 is of logic type and in the example shown, we admit that this signal is in the state logic "0" as long as the timepiece delays, that is to say as long as the average speed of the rotor 2a is lower than the set speed Vc. In these conditions, the component or transistor 10 remains blocked and the rotor 2a is not braked.

En revanche, tant que la pièce d'horlogerie avance ou que la vitesse moyenne du rotor 2a est supérieure à la vitesse de consigne Vc, le signal de commande de freinage SF est formé d'impulsions de durées déterminées commençant au début de chaque alternance, par exemple positive, de la tension Ug aux bornes B1 et B2 de la bobine 2b. Pendant chacune de ces impulsions du signal de commande SF, celui-ci est à l'état "1" rendant conducteur le transistor 10 et freinant le rotor 2a.On the other hand, as long as the timepiece advances or that the average speed of the rotor 2a is greater than the set speed Vc, the brake control signal SF is made up of pulses of determined duration starting at the start of each alternation, for example positive, of the Ug voltage at terminals B1 and B2 of coil 2b. during each of these pulses of the control signal SF, this one is in state "1" making the transistor 10 conductive and braking the rotor 2a.

La figure 2 illustre un mode de réalisation selon l'invention du circuit de redressement montré à la figure 1. Le circuit de redressement 4 comprend un redresseur doubleur de tension 20, deux diodes 21 et 22 et deux condensateurs 23 et 24.FIG. 2 illustrates an embodiment according to the invention of the rectifier circuit shown in Figure 1. The rectifying circuit 4 comprises a rectifier voltage doubler 20, two diodes 21 and 22 and two capacitors 23 and 24.

Le redresseur doubleur de tension 20, qui est connecté aux bornes de sortie B1 et B2 de la génératrice, est agencé à délivrer à travers deux bornes de sortie 20a et 20b une tension continue Us de sorte que le potentiel à la première borne de sortie 20a soit supérieur à celui de ladite deuxième borne de sortie 20b. A cet effet, le redresseur doubleur de tension 20 comprend un condensateur 27 et une diode 25 reliés en série entre la première borne de sortie B2 et la deuxième borne de sortie B1 de la génératrice 2. La diode 25 est orientée de manière à permettre la circulation de la première borne de sortie B2 à la deuxième borne de sortie B1 de la génératrice 2.The voltage doubling rectifier 20, which is connected to the output terminals B1 and B2 of the generator, is arranged to deliver through two output terminals 20a and 20b a DC voltage Us so that the potential at the first output terminal 20a is greater than that of said second output terminal 20b. To this end, the voltage doubler rectifier 20 includes a capacitor 27 and a diode 25 connected in series between the first terminal B2 and the second output terminal B1 of the generator 2. The diode 25 is oriented so that allow circulation of the first B2 exit terminal to the second output terminal B1 of generator 2.

En outre, le redresseur doubleur de tension 20 comprend un condensateur 28 et une diode 26 reliés en série entre la première borne de sortie B2 et la deuxième borne de sortie B1 de la génératrice 2. La diode 26 est orientée de manière à permettre la circulation de la deuxième borne de sortie B1 à la première borne de sortie B2 de la génératrice 2.In addition, the voltage doubling rectifier 20 includes a capacitor 28 and a diode 26 connected at series between the first output terminal B2 and the second output terminal B1 of generator 2. Diode 26 is oriented so as to allow circulation of the second output terminal B1 at the first output terminal B2 of generator 2.

L'anode de la diode 25 est reliée à la borne de sortie du redresseur doubleur de tension 20a, tandis que la cathode de la diode 26 est reliée à la borne de sortie du redresseur doubleur de tension 20b.The anode of diode 25 is connected to the terminal of output of the voltage doubling rectifier 20a, while the cathode of diode 26 is connected to the output terminal of the voltage doubling rectifier 20b.

Les diodes 21, 22, 25 et 26 sont de préférence du type Schottky ou du type actives afin de limiter la perte de tension lors de leur conduction dans le sens direct.The diodes 21, 22, 25 and 26 are preferably Schottky type or active type to limit loss of tension during their direct conduction.

Lorsque la génératrice 2 génère une tension Ug qui est positive, c'est-à-dire que le potentiel de la borne B2 est supérieur au potentiel de la borne B1, la diode 25 est rendue conductrice, et un courant circule entre la borne B2 et B1 pour charger le condensateur 27. Ce dernier a alors à travers ses armatures une tension Uc1 d'environ Ug, car ce condensateur est en ce cas branché en parallèle avec la génératrice 2.When generator 2 generates a voltage Ug which is positive, i.e. the potential of terminal B2 is greater than the potential of terminal B1, diode 25 is made conductive, and a current flows between the terminal B2 and B1 to charge the capacitor 27. The latter has then across its armatures a voltage Uc1 of about Ug, because this capacitor is in this case connected in parallel with generator 2.

De même, lorsque la génératrice 2 génère une tension Ug qui est négative, c'est-à-dire que le potentiel de la borne B2 est inférieur au potentiel de la borne B1, la diode 25 est rendue non-conductrice alors que la diode 26 est rendue conductrice. Ainsi, un courant circule entre la borne B1 et B2 pour charger le condensateur 28. Ce dernier aura à travers ses armatures une tension Uc2 d'environ Ug.Similarly, when generator 2 generates a voltage Ug which is negative, that is to say that the potential of the terminal B2 is less than the potential of terminal B1, the diode 25 is made non-conductive while diode 26 is made conductive. Thus, a current flows between the terminal B1 and B2 to charge the capacitor 28. The latter will have through its reinforcements a tension Uc2 of approximately Ug.

De ce fait, la tension Us à travers les bornes de sortie 20a et 20b du redresseur doubleur de tension 20 est une tension continue qui a une valeur équivalente à Uc1 + Uc2 ≈ 2Ug (si l'on néglige les pertes de tension à travers les diodes 25 et 26).Therefore, the voltage Us across the terminals of output 20a and 20b of the voltage doubler rectifier 20 is a DC voltage which has a value equivalent to Uc1 + Uc2 ≈ 2Ug (if one neglects the losses of tension through diodes 25 and 26).

La diode 21 et le condensateur 23 sont reliés en série entre la borne de sortie 20a du redresseur doubleur de tension 20 et la borne de sortie B2 de la génératrice 2. De même, la diode 22 et le condensateur 24 sont reliés en série entre la borne de sortie 20b du redresseur doubleur de tension 20 et la borne de sortie B2 de la génératrice 2. La diode 21 est orientée de manière à permettre la circulation d'un courant de la borne de sortie 20a du redresseur doubleur de tension 20 à la borne B2 de la génératrice 2, alors que la diode 22 est orientée de manière à permettre la circulation d'un courant de la borne B2 de la génératrice 2 à la borne de sortie 20b du redresseur doubleur de tension 20.The diode 21 and the capacitor 23 are connected in series between the output terminal 20a of the doubling rectifier of voltage 20 and the output terminal B2 of the generator 2. Likewise, the diode 22 and the capacitor 24 are connected in series between the output terminal 20b of the rectifier voltage doubler 20 and the output terminal B2 of the generator 2. The diode 21 is oriented so that allow the circulation of a current from the terminal output 20a of the voltage doubler rectifier 20 at the terminal B2 of generator 2, while diode 22 is oriented so as to allow the flow of a current from the terminal B2 of generator 2 to output terminal 20b of voltage doubler rectifier 20.

Nous allons maintenant reconsidérer le cas où la génératrice 2 génère une tension Ug qui est positive. On voit sur la figure 2 que, dans ce cas, la différence de potentiels entre la borne B2 et la borne 20b est Uc2 + Ug ≈ 2Ug. Par conséquent, la diode 22 est rendue conductrice et un courant circule entre la borne B2 et la borne 20b à travers le condensateur 24 pour charger ce dernier. Ce dernier aura alors à travers ses armatures une tension Uc4 équivalente à 2Ug.We will now reconsider the case where the generator 2 generates a voltage Ug which is positive. We see in Figure 2 that in this case the difference of potentials between terminal B2 and terminal 20b is Uc2 + Ug ≈ 2Ug. Therefore, the diode 22 is made conductive and a current flows between terminal B2 and the terminal 20b through capacitor 24 to charge this latest. The latter will then have through its frames a voltage Uc4 equivalent to 2Ug.

De même, lorsque la génératrice 2 génère une tension Ug qui est négative, le différence de potentiels entre la borne 20a et la borne B2 est Uc1 + Ug ≈ 2Ug. Par conséquent, la diode 21 est rendue conductrice et un courant circule entre la borne 20a et la borne B2 à travers le condensateur 23 pour charger ce dernier. Ainsi, ce dernier aura à travers ses armatures une tension Uc3 équivalente à 2Ug.Similarly, when generator 2 generates a voltage Ug which is negative, the potential difference between the terminal 20a and terminal B2 is Uc1 + Ug ≈ 2Ug. Through Consequently, the diode 21 is made conductive and a current flows between terminal 20a and terminal B2 at through the capacitor 23 to charge the latter. So, the latter will have a tension across its frames Uc3 equivalent to 2Ug.

On voit alors que la tension Ua à travers les bornes de sortie 4a et 4b du circuit de redressement est une tension continue qui a une valeur équivalente à Uc3 + Uc4 ≈ 4Ug . We then see that the voltage Ua across the terminals output 4a and 4b of the rectification circuit is a direct voltage which has a value equivalent to Uc3 + Uc4 ≈ 4Ug.

L'agencement montré à la figure 2 permet alors de quadrupler la tension générer par la génératrice 2. Ainsi, même lorsque la génératrice 2 génère une tension Ug qui est très faible, on peut assurer une tension d'alimentation satisfaisante aux circuits électroniques associés à la pièce d'horlogerie du type représentée à la figure 1.The arrangement shown in Figure 2 then allows quadruple the voltage generated by generator 2. So, even when generator 2 generates a Ug voltage which is very weak, we can ensure a tension power supply to electronic circuits associated with the timepiece of the type shown in figure 1.

En outre, pour une même valeur de tension d'alimentation, considéré par le réalisateur de la pièce d'horlogerie comme étant un seuil inférieur pour alimenter ces circuit électroniques, l'agencement montré à la figure 2 a l'avantage de nécessiter moins de tension alternative de la génératrice 2. Par conséquent, la génératrice 2 peut être réalisée avec un nombre de spires moindre, ce qui implique un prix de fabrication plus faible.In addition, for the same voltage value supply, considered by the director of the piece as a lower threshold for powering these electronic circuits, the arrangement shown in figure 2 has the advantage of requiring less AC voltage of generator 2. Therefore, generator 2 can be carried out with a smaller number of turns, which implies a lower manufacturing price.

Avantageusement, le circuit de redressement 4 de la figure 2 ne nécessite pas un nombre élevé d'éléments encombrants. On constate sur la figure 2 que les condensateurs 23 et 24 fournissent, à travers les bornes 4b et 4a, de l'énergie importante aux circuits électroniques de la pièce d'horlogerie, tandis que les condensateurs 27 et 28 sont utilisés en quelque sorte pour transférer une charge engendrée par la génératrice 2 aux condensateurs 23 et 24. Ainsi, les condensateurs 27 et 28 n'ont pas besoin d'une capacité grande et, dans des réalisations pratiques effectuées dans le cadre de la présente invention, peuvent même être intégrés avec les circuits électroniques. Par exemple, dans un circuit réalisé par l'inventeur, les condensateurs 23 et 24 ont chacun une valeur de 2200 nF, tandis que les condensateurs 27 et 28 ont chacun une valeur de seulement 100 nF. De préférence, les condensateurs 27 et 28 ont une capacité entre 100 et 100 nF et les condensateurs 23 et 24 ont une capacité entre 100 et 100 nF, une capacité 29 entre 4a et 4b ayant 2200 nF.Advantageously, the rectification circuit 4 of the figure 2 does not require a large number of elements bulky. It can be seen in FIG. 2 that the capacitors 23 and 24 supply, across the terminals 4b and 4a, significant energy on the circuits of the timepiece, while the capacitors 27 and 28 are sort of used to transfer a load generated by generator 2 to capacitors 23 and 24. So, capacitors 27 and 28 do not need a large capacity and, in practical achievements carried out as part of the present invention, can even be integrated with electronic circuits. For example, in a circuit produced by the inventor, the capacitors 23 and 24 have each 2200 nF, while the capacitors 27 and 28 each have a value of only 100 nF. Of preferably, capacitors 27 and 28 have a capacity between 100 and 100 nF and the capacitors 23 and 24 have a capacity between 100 and 100 nF, a capacity 29 between 4a and 4b having 2200 nF.

Il est à noter que plusieurs modifications et/ou améliorations peuvent être apportées au système de génératrice selon l'invention sans sortir du cadre de celle-ci.It should be noted that several modifications and / or improvements can be made to the generator according to the invention without departing from the scope of this one.

A ce propos, il est possible de réaliser un multiplicateur de tension qui multiplie la tension de la génératrice 2 par un facteur de huit, seize, etc. tout en utilisant les mêmes principes décrites ci-dessus. Pour réaliser une pièce d'horlogerie comportant un redresseur/multplicateur-par-huit, il suffit de remplacer le redresseur doubleur de tension 20 de la figure 2 par le circuit de redressement 4 entier de cette figure.In this regard, it is possible to carry out a voltage multiplier which multiplies the voltage of the generator 2 by a factor of eight, sixteen, etc. all in using the same principles described above. For make a timepiece with a rectifier / multiplier-by-eight, just replace the voltage doubler rectifier 20 of FIG. 2 by the entire rectifier circuit 4 in this figure.

De même, pour réaliser une pièce d'horlogerie comportant un redresseur/multiplicateur-par-seize, on peut remplacer le redresseur/multplicateur-par-huit mentionné dans le paragraphe précédent.Similarly, to make a timepiece with a rectifier / multiplier-by-sixteen, we can replace the mentioned rectifier / multiplier-by-eight in the previous paragraph.

Claims (6)

  1. Timepiece including :
    a barrel (1),
    a spring (1a) housed in said barrel (1),
    time display members (5) mechanically coupled to said barrel (1),
    an electric power generator (2) also mechanically coupled to said barrel (1) and arranged to supply an alternating voltage (Ug) across first and second output terminals (B1, B2),
    a rectifier circuit (4) connected to said first and second output terminals of said generator (2) across two respective input terminals and arranged to supply a direct voltage (Ua) across two output terminals (4a, 4b) from said alternating voltage (Ug), and
    a regulator circuit (6) supplied by said direct voltage (Ua) and intended to control the rotational speed of said generator (2) so as to subject said display members (5) to a rotational speed corresponding to a correct indication of the current time,
    said timepiece being characterized in that said rectifier circuit (4) comprises,
    a voltage doubler rectifier (20) connected to said first and second output terminals (B2, B1) of said generator (2) and arranged to supply a direct voltage across a first output terminal (20b) and a second output terminal (20a) so that the potential at said first output terminal is greater than the potential at said second output terminal (2a),
    a first capacitor (23) and a first diode (21) connected in series between said first output terminal (20a) of said voltage doubler rectifier (20) and the first output terminal (B2) of said generator (2), said first diode (21) being oriented in order to allow a current to flow from said first output terminal (20a) of said voltage doubler rectifier (20) to said first output terminal (B2) of said generator (2), and
    a second capacitor (24) and a second diode (22) connected in series between said first output terminal (B2) of said generator (2) and the second output terminal (20a) of said voltage doubler rectifier (20), said second diode (22) being oriented in order to allow a current to flow from said first output terminal (B2) of said generator (2) to said second output terminal (20b) of said voltage doubler rectifier (20).
  2. Timepiece according to claim 1, characterized in that said voltage doubler rectifier (20) comprises :
    a third capacitor (27) and a third diode (25) connected in series between said first output terminal (B2) and said second output terminal (B1) of said generator (2), said third diode (25) being oriented in order to allow a current to flow from said first output terminal (B2) to said second output terminal (B1) of said generator (2), and
    a fourth capacitor (28) and a fourth diode (26) connected in series between said first output terminal (B2) and the second output terminal (B1) of said generator (2), said fourth diode (26) being oriented in order to allow a current to flow from said second output terminal (B1) to said first output terminal (B2) of said generator (2).
  3. Timepiece according to claim 1 or 2, characterized in that said diodes (21,22,25,26) are of the Schottky type or active type.
  4. Timepiece according to any one of preceding claims, characterized in that said first (23) and second (24) capacitors have a capacitance between 100 and 2200 nF.
  5. Timepiece according to any one of claims 2 to 4, characterized in that said third (27) and fourth (28) capacitors have a capacitance between 100 and 2200 nF.
  6. Timepiece according to claim 5, characterized in that said third (27) and fourth (28) capacitors are of the integrated type.
EP19960119747 1996-12-10 1996-12-10 Time piece having an electric energy generator Expired - Lifetime EP0848306B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19960119747 EP0848306B1 (en) 1996-12-10 1996-12-10 Time piece having an electric energy generator
DE1996609618 DE69609618T2 (en) 1996-12-10 1996-12-10 Timepiece with a generator for generating electrical energy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19960119747 EP0848306B1 (en) 1996-12-10 1996-12-10 Time piece having an electric energy generator

Publications (2)

Publication Number Publication Date
EP0848306A1 EP0848306A1 (en) 1998-06-17
EP0848306B1 true EP0848306B1 (en) 2000-08-02

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Application Number Title Priority Date Filing Date
EP19960119747 Expired - Lifetime EP0848306B1 (en) 1996-12-10 1996-12-10 Time piece having an electric energy generator

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DE (1) DE69609618T2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60312536T2 (en) * 2003-12-16 2007-11-22 Asulab S.A. Electromechanical watch equipped with a power reserve indicator
EP1843227A1 (en) 2006-04-07 2007-10-10 The Swatch Group Research and Development Ltd. Coupled resonator for control system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849717A (en) * 1970-08-13 1974-11-19 R Ostreicher Circuit for operation of gas discharge lamps
DE2402603A1 (en) * 1974-01-19 1975-07-24 Hubert Kalinowski Voltage multiplier with chain of four diodes - has capacitors converting AC input into doubled and quadrupled outputs
US4799003A (en) * 1987-05-28 1989-01-17 Tu Xuan M Mechanical-to-electrical energy converter
DE3906861A1 (en) * 1988-03-04 1989-09-14 Fraunhofer Ges Forschung Power supply unit (energy supply unit)
JP3174245B2 (en) * 1994-08-03 2001-06-11 セイコーインスツルメンツ株式会社 Electronic control clock

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Publication number Publication date
DE69609618T2 (en) 2001-04-12
DE69609618D1 (en) 2000-09-07
EP0848306A1 (en) 1998-06-17

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