EP4130890B1 - Uhrwerk mit oszillator, der eine piezoelektrische spiralfeder enthält - Google Patents

Uhrwerk mit oszillator, der eine piezoelektrische spiralfeder enthält Download PDF

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Publication number
EP4130890B1
EP4130890B1 EP21189581.8A EP21189581A EP4130890B1 EP 4130890 B1 EP4130890 B1 EP 4130890B1 EP 21189581 A EP21189581 A EP 21189581A EP 4130890 B1 EP4130890 B1 EP 4130890B1
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EP
European Patent Office
Prior art keywords
amplitude
oscillator
horological movement
control circuit
electronic control
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EP21189581.8A
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English (en)
French (fr)
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EP4130890A1 (de
Inventor
Matthias Imboden
Alexandre DIDIER
Alexandre Haemmerli
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Swatch Group Research and Development SA
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Swatch Group Research and Development SA
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Priority to EP21189581.8A priority Critical patent/EP4130890B1/de
Priority to US17/804,667 priority patent/US20230044830A1/en
Priority to JP2022101597A priority patent/JP7402927B2/ja
Priority to CN202210903356.0A priority patent/CN115705007A/zh
Publication of EP4130890A1 publication Critical patent/EP4130890A1/de
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Publication of EP4130890B1 publication Critical patent/EP4130890B1/de
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
    • G04F5/04—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses
    • G04F5/06—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses using piezoelectric resonators
    • G04F5/063—Constructional details
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/066—Manufacture of the spiral spring
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/26—Compensation of mechanisms for stabilising frequency for the effect of variations of the impulses
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/28—Compensation of mechanisms for stabilising frequency for the effect of imbalance of the weights, e.g. tourbillon
    • 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
    • G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance
    • G04C3/047—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance using other coupling means, e.g. electrostrictive, magnetostrictive
    • 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
    • G04C3/08—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G04C3/12—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by piezoelectric means; driven by magneto-strictive means

Definitions

  • the present invention relates to a watch movement comprising a barrel and an analog time display, which is driven by the barrel via a gear train, as well as a sprung balance to control the operation of the watch movement.
  • the hairspring is of the piezoelectric type with electrodes arranged on the two side surfaces.
  • the invention also relates to a watch incorporating such a watch movement and a source of electrical energy.
  • Patent applications EP 3 540 528 And EP 3 629 103 respectively describe a method for regulating the average frequency of a sprung balance and a method for synchronizing the frequency of a sprung balance using a piezoelectric balance spring connected to an electronic control unit provided with a quartz oscillator.
  • the present invention aims to modify a watch movement of the mechanical type by incorporating an electronic system making it possible to increase its running precision, without giving up a sprung balance to clock the progress of the watch movement, in particular driving its analog display device. Moreover, the present invention proposes to modify the watch movement so that it remains functional even when the electronic system is inactive, in particular due to lack of electrical energy available.
  • the subject of the invention is a watch movement comprising an analog time display, a gear train, a barrel in kinematic relationship with the analog display via the gear train, and an oscillator formed by a resonator, comprising a balance wheel and a hairspring.
  • the watch movement is configured so that the barrel is capable of driving the analog display and alone maintaining a functional oscillation of the oscillator with a first amplitude which is notably a function of the spatial orientation of the watch movement.
  • the electronic control circuit is arranged to be able to be connected to a source of electrical energy and to be able to control the application of an electrical voltage to said at least one electrode so as to generate electrical driving pulses for the oscillator which provide it with sufficient energy to allow a functional oscillation of this oscillator, for each spatial orientation of the watch movement, with a second amplitude which is greater than a maximum nominal value of the first amplitude for this spatial orientation.
  • the electronic control circuit is arranged to control said application of an electrical voltage so as to maintain the second amplitude substantially constant for any spatial orientation of the watch movement and all barrel cocking level.
  • the electronic control circuit comprises a circuit for detecting the amplitude of a voltage induced in the piezoelectric hairspring and a feedback loop to maintain this amplitude at a given setpoint value, thus allowing to regulate the amplitude of the oscillation of the resonator.
  • said maximum nominal value is less than or equal to 300° for any spatial orientation of the watch movement and said second amplitude is greater than 300° for any spatial orientation of the watch movement and any winding level of the barrel.
  • the invention also relates to a watch in which a source of energy is incorporated which is formed by an electricity generator arranged to be able to collect external energy and transform it into electrical energy, so as to enable power supply of the electronic control circuit. and the piezoelectric hairspring.
  • the precision of the watch incorporating the movement according to the invention can be increased, in particular thanks to a large amplitude for the oscillation of the balance which can be maintained by the electrical driving pulses supplied to the electromechanical oscillator via the piezoelectric hairspring.
  • the preferred embodiment makes it possible firstly to compensate for a reduction in the force torque supplied by the barrel, so as to maintain substantially constant the sustaining power of the oscillation for each spatial orientation of the watch movement, respectively of the watch which incorporates it.
  • the variation in frequency of the oscillator generally occurring in a conventional mechanical movement due to the variation in the force torque provided by the barrel over time is eliminated in this preferred embodiment.
  • this preferred embodiment makes it possible to eliminate a difference in amplitude for different spatial positions of the watch movement, respectively of the watch which incorporates it.
  • the mode preferred embodiment makes it possible to avoid variations in the running of the watch movement which may occur for other reasons in conventional mechanical movements, namely the aging of oils, hard points in the gear train or a momentarily increased torque demand, such as when moving from one date to the next, etc.
  • the present invention makes it possible to effectively resolve the various problems that may occur in mechanical watch movements and lead to a loss of isochronism, which results in a temporal drift in the display of the current time.
  • the watch movement 2 comprises an analog time display 4, a gear train 6, a barrel 8 driving the analog display via the gear train, and an electromechanical oscillator 10 formed by a resonator 12, comprising a balance wheel 14 and a piezoelectric hairspring 16, and a mechanical escapement 18 coupling the balance wheel to the gear train.
  • the watch movement is equipped with an oscillating mass 24 (not shown in the Figures 1 And 2 , but to Figures 5 And 6 ) used to wind the barrel.
  • the balance wheel is pivoted in a balance bridge 26, this bridge carrying a rack 28 used to adjust the oscillation frequency of the resonator 12, as is usual in mechanical watch movements.
  • the piezoelectric spiral is formed at least partially of a piezoelectric material and comprises at least two electrodes, at least one of which is connected to an electronic control circuit 20.
  • Figure 3 are shown the resonator 12 and the electronic control circuit 20 to which two external electrodes 68 and 69 of the piezoelectric spiral 16 are connected by two electrical connections 21A and 21B.
  • a cross section of the piezoelectric spiral 16 is shown in Figure 4 in no way limiting.
  • This hairspring comprises a central body 60 made of silicon, a layer of silicon oxide 62 deposited on the surface of the central body so as to thermally compensate the hairspring, a first conductive layer 64 deposited on the silicon oxide layer, and a piezoelectric material deposited in the form of a piezoelectric layer 66 on the first conductive layer 64.
  • the piezoelectric layer consists of an aluminum nitride crystal formed by growth of this crystal from the first conductive layer and perpendicular thereto.
  • Two external electrodes 68 and 69, formed by a second partial conductive layer on the piezoelectric layer, are arranged respectively on the two lateral sides of the hairspring and are connected to two respective terminals 70 and 71 of the electronic control circuit 20.
  • the piezoelectric layer 66 comprises a first part 74A and a second part 74B which extend respectively on the two lateral sides of the central body 60 and which present, by their growth from the first conductive layer 64, respective crystallographic structures which are symmetrical relative to a median plane 76 parallel to these two lateral sides.
  • the piezoelectric layer 66 has two respective piezoelectric axes 78A and 78B perpendicular to this piezoelectric layer and in opposite directions.
  • the internal electrode formed from the first conductive layer 64, does not need its own electrical connection with the electronic control circuit 20 or to the ground of the watch movement, although this is not excluded.
  • the piezoelectric material 66 and the two electrodes 68 and 69 are arranged so as to allow the application, controlled by the electronic control circuit 20, of an electrical stress on the piezoelectric spiral so as to provide the resonator 12 with driving pulses which participate at least in part in maintaining a functional oscillation of this resonator, preferably with a substantially constant amplitude.
  • the electronic control circuit 20 is arranged to be able to be connected to a source of electrical energy 30 and to be able to control the application of an electrical voltage between the external electrodes 68 and 69, so as to generate driving pulses for the resonator 12.
  • the electronic control circuit is arranged to be able to manage the application of an electrical voltage to at least one of the two external electrodes 68 and 69, so as to generate pulses driving forces for the electromechanical oscillator 10 via the piezoelectric hairspring constrained by the applied electrical voltage, so as to provide electrical energy to this oscillator which is sufficient for the resonator 12 to be able to have a functional oscillation with an amplitude greater than a maximum nominal value for the amplitude of an oscillation functional of this resonator, for each spatial orientation of the watch movement, in the absence of motor impulses of electrical origin.
  • the electromechanical oscillator 10 that is to say energy pulses, which make it possible either to maintain a functional oscillation of the resonator 12, or to participate in the maintenance of such a functional oscillation.
  • the frequency of these motor impulses depends in particular on their duration and their electrical voltage.
  • driving pulses can be dimensioned so that they occur once during each alternation or once per period of the oscillation of the resonator.
  • the Figures 5 And 6 schematically represent a watch 22 according to the invention comprising a watch movement according to the invention.
  • the parts of the watch movement already described will not be described again here in detail.
  • the watch 22 comprises a source of electrical energy 30 which is formed by an electricity generator arranged to produce electricity so as to enable power supply of the electronic control circuit 20 and the piezoelectric hairspring.
  • the electricity generator is connected to a storage unit, in particular a rechargeable battery or a supercapacitor, via a circuit for managing the electrical power supplied to the electronic control circuit 20 and to the electromechanical oscillator 10.
  • the voltage necessary to power the piezoelectric hairspring is located in a voltage range between 10 V and 40 V.
  • the electrical power management circuit is arranged to be able to increase the voltage accumulated in the storage unit or supplied directly by the electricity generator.
  • it includes a voltage booster, for example a charge pump.
  • thermopile which receives thermal energy coming from the user's arm as energy external to the watch.
  • the thermopile is thus arranged so as to be able to convert the heat of a user's body into electricity.
  • the watch When the watch is not worn and the power supply is not active, this watch can be left in a stable position so that the oscillation amplitude and thus the frequency of the electromechanical oscillator are no longer disturbed by variations in orientation of the watch.
  • the electrical power supply is active and the electrical control circuit is operational when the watch is worn, namely when the amplitude and thus the frequency of a conventional mechanical movement vary depending on the spatial orientation of the watch .
  • the present invention generally makes it possible to improve the operation of the watch and, in a preferred embodiment which will be described in more detail later, to maintain constant the amplitude of oscillation of the electromechanical oscillator to any spatial orientation and any level of cocking of the barrel which is sufficient to drive the analog display device.
  • the watch according to the invention does not does not include an electric generator which makes it autonomous, but it does include a battery in the form of a cell.
  • the watch movement 2 therefore behaves like a classic mechanical movement.
  • the escapement 18 is a usual escapement which is not only counter but also arranged to allow the barrel, via a gear train, to provide mechanical maintenance pulses to the resonator 12 to obtain a functional oscillation of the latter.
  • the watch movement is therefore configured so that the barrel is capable of driving the analog display 4 of the watch 22 and of alone maintaining a functional oscillation of the oscillator with a first amplitude which is in particular a function of the spatial orientation of the watch movement.
  • the oscillation frequency of the resonator will therefore vary depending on the spatial orientation of the watch movement and in general also the winding level of the barrel. It is known that when the torque provided by the barrel decreases, the amplitude of the oscillation of the resonator also decreases and this significantly in the last third of the power reserve. A reduction in amplitude generally results in a reduction in oscillation frequency and walking precision is therefore affected. Furthermore, the amplitude varies depending on the orientation of the watch movement (more particularly of the resonator), so that this first state is therefore not ideal but useful in the context of the present invention which has in particular the aim of keeping the watch movement functional in the absence of sufficient electrical power. This first state is in particular intended for a situation where the watch concerned is not worn and advantageously left in a given favorable position. We thus limit the variation in frequency of the resonator since no variation in amplitude due to changes in orientation of this resonator occurs.
  • the electrical energy source 30 of the watch comprises sufficient stored electrical energy or it receives sufficient electrical energy from the electricity generator to correctly power the piezoelectric hairspring, so that the electronic control circuit 20 then generates electrical driving pulses.
  • the electronic control circuit manages the application of an electrical voltage to at least one electrode of the two electrodes 68, 69 of the piezoelectric hairspring by applying an electrical voltage to at least one of the corresponding terminals 70, 71 (see Figures 4 And 7 ), so as to generate driving pulses for the oscillator 10 which provide it with sufficient energy to allow a functional oscillation of the oscillator, for each spatial orientation of the watch movement, with a second amplitude which is greater than a maximum nominal value of the first amplitude, mentioned previously and occurring in the first main state, for this spatial orientation.
  • the maximum nominal value of the first amplitude is less than or equal to 300° for any spatial orientation of the watch movement, in particular of its resonator 12, and the second amplitude is greater than 300° for any spatial orientation of the watch movement and any level of winding of the barrel.
  • the maximum nominal value of the first amplitude is between 240° and 300° for any spatial orientation of the watch movement, in particular of its resonator 12, and the second amplitude is provided between 305° and 330° for any spatial orientation of the watch movement and any winding level of the barrel.
  • the invention makes it possible to provide a gear ratio between the barrel and the escape wheel which can be greater than that of conventional mechanical movements. , and therefore to increase the power reserve, while ensuring functional oscillation of the oscillator 10 at least during stable conditions, in particular in the absence of accelerations such as when the watch is not worn, preferably for any spatial orientation of this watch and therefore of the watch movement but at least for a given orientation.
  • two operating variants can occur in the second main state of the watch 22 described above .
  • the first variant in particular because of the inertia of the train (including the escape wheel), the maintenance of the resonator 12 and also the reciprocating movement of the anchor of the mechanical escapement are substantially or completely ensured by the electrical supply of the piezoelectric hairspring, in particular by electrical driving pulses.
  • the driving speed of the anchor by the balance of resonator 12 is too high for the escape wheel to be able, during each step of this wheel exhaust after releasing the anchor, provide a significant torque to this anchor.
  • the maintenance of the resonator and the reciprocating movement of the anchor are ensured jointly by the barrel 8 and the source of electrical energy 30.
  • a watch according to the invention only presents the one or the other of these two variants in its operation when the second main state is activated.
  • the first variant and the second operating variant intervene at different times, in particular depending on the winding level of the barrel and possibly on the spatial orientation of this other watch, in particular of its resonator.
  • the electronic control circuit 20 is arranged to be able to control the application of an electrical voltage to the piezoelectric spiral so as to maintain, in the second main state of the operation of the watch movement, the amplitude of the oscillation of the resonator 12 / oscillator 14 substantially constant in particular for any spatial orientation of the watch movement and any winding level of the barrel.
  • the electronic control circuit 20 comprises a peak voltage detector 46, which is arranged to be able to detect substantially the amplitude of the voltage induced in the piezoelectric hairspring 16 when the resonator 12 oscillates, and a circuit regulation 20A which receives from the peak voltage detector a signal S A relating to the amplitude of the induced voltage and which is arranged to manage a supply voltage V A , supplied to the piezoelectric spiral through a locking loop phase 20B, as a function of a set value Sc for the signal S A supplied by the peak voltage detector, so as to obtain an oscillation of the resonator with a substantially constant amplitude.
  • a peak voltage detector 46 which is arranged to be able to detect substantially the amplitude of the voltage induced in the piezoelectric hairspring 16 when the resonator 12 oscillates
  • a circuit regulation 20A which receives from the peak voltage detector a signal S A relating to the amplitude of the induced voltage and which is arranged to manage a supply voltage V A
  • the setpoint value Sc corresponds to a setpoint amplitude planned for the oscillation of the resonator 12.
  • the regulation circuit 20A comprises processing parts P, I, D arranged in parallel and well known to those skilled in the art, which process a difference between the setpoint value Sc and the value of the signal d amplitude S A by a proportional response, respectively as a function of an integration and a derivation of this difference over time.
  • the regulation circuit also receives a reference voltage V R which is adjusted according to the regulation carried out by the 20A circuit.
  • a buffer element 44 transistor with high input impedance
  • the phase-locked loop 20B controls the phase of the periodic power supply signal to the phase of the induced voltage signal, supplied in particular to terminal 71, so that the supply voltage constrains the piezoelectric spiral in the direction of its movement, which is either in contraction or in extension depending on the alternation in progress.
  • circuit 20B detects zero crossings of the induced voltage, in particular at terminal 71.
  • the polarity of the supply voltage is selected so as to constrain the piezoelectric spiral in the direction of its movement, which is alternately in extension and contraction during the alternations of the oscillation of the resonator.
  • a quartz oscillator is associated with the electronic control circuit 20.
  • This quartz oscillator can be used for various needs.
  • the management of the supply voltage V A can include modulation of the driving pulses with a variable cycle ratio as a function of the amplitude signal S A and the setpoint value Sc, in particular their difference.
  • the electrical pulses motors are triggered with a set frequency Fc for the oscillator 10 / the resonator 12 which is determined very precisely by the quartz oscillator.
  • the frequency Fs of the supply signal is not too far from the resonance frequency of the resonator, namely from its natural frequency F N , such a supply of the piezoelectric spiral can impose the set frequency on the maintained resonator 12, in partly or totally, by the electrical driving pulses, so that the electromechanical oscillator 10 will be able to oscillate at the set frequency, with the precision of quartz, and an amplitude greater than that corresponding in the first main operating state, and in particular greater than a given limit value, whatever the spatial orientation of the watch movement.
  • the quartz oscillator more generally the electronic oscillator, is in this system a master oscillator and the electromechanical oscillator is a slave oscillator.
  • the electromechanical oscillator is slaved to the electronic oscillator indirectly, through the generation of electrical driving pulses supplied to the electromechanical oscillator, the triggering of which is controlled/determined by the electronic oscillator.
  • This number N must be provided sufficiently small, depending in particular on the range of possible values for the natural frequency F N of the electromechanical oscillator and also on the quantity of electrical energy to be supplied to this electromechanical oscillator to have an amplitude of oscillation increased and advantageously maintained above a predetermined limit value.
  • the advantageous variant described above can be easily implemented to obtain a gain in precision for the operation of the watch movement in the second main operating state, and therefore of the shows which incorporates it, almost without an increase in electrical consumption linked to the maintenance, partial or total, of a relatively large amplitude oscillation.
  • the power supply circuit does not need to include a phase-locked loop for controlling the driving pulses; which simplifies its design.
  • the electronic control circuit is therefore associated with a quartz oscillator and arranged so as to generate the electrical driving pulses with a specific supply frequency which is determined by the quartz oscillator and which is a function of a set frequency for the electromechanical oscillator, which is configured so that its natural oscillation frequency remains within a range of values, for any spatial orientation of the watch movement and any winding level of the barrel, sufficiently close to the set frequency to allow the electrical driving pulses to impose, at least after an initial operating period and in the absence of excessively significant disturbances, the set frequency Fc to the electromechanical oscillator 10, having an oscillation functional of this electromechanical oscillator at the second amplitude mentioned above, preferably constant.
  • N which can be variable, is selected from a range of values making it possible to impose the set frequency Fc on the electromechanical oscillator, this range of values being a function of the range of possible natural frequencies for this oscillator, which is kept sufficiently close to the set frequency thanks to the first regulation mentioned above.
  • the second regulation by a signal of Periodic power supply determined by the quartz oscillator, in particular by electrical driving pulses at the set frequency Fc is guaranteed with a relatively large functional amplitude, provided that the number N is not too high.
  • the advantageous variant of the particular embodiment may, in another implementation, not be combined with the preferred embodiment of the electronic control circuit, so that amplitude regulation is not provided and the frequency of the electromechanical oscillator is imposed, at least after an initial operating phase, by the generation of electrical driving pulses at a power supply frequency Fs defined previously.
  • the power supply circuit does not include a circuit for detecting the zero crossing of the induced voltage.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electric Clocks (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
  • Electromechanical Clocks (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Claims (10)

  1. Uhrwerk (2) mit einer analogen Zeitanzeige (4), einem Räderwerk (6), einem über das Räderwerk kinematisch mit der analogen Anzeige verbundenen Federhaus (8) und einem aus einem Resonator (12) gebildeten Oszillator (10), der eine Unruh (14) und eine piezoelektrische Unruhfeder (16) sowie eine mechanische Hemmung (18) umfasst, die die Unruh mit dem Räderwerk verbindet, wobei die piezoelektrische Unruhspirale zumindest teilweise aus einem piezoelektrischen Material (66) und mindestens zwei Elektroden (68, 69) aufweist, von denen mindestens eine Elektrode mit einem elektronischen Steuerkreis (20) verbunden ist, wobei das piezoelektrische Material und die mindestens eine Elektrode so angeordnet sind, dass sie das Anlegen einer von dem elektronischen Steuerkreis gesteuerten elektrischen Spannung an die piezoelektrische Spiralfeder ermöglichen, wobei das Uhrwerk so konfiguriert ist, dass das Federhaus in der Lage ist, die analoge Anzeige zu steuern und allein eine funktionelle Schwingung des Oszillators mit einer ersten Amplitude aufrechtzuerhalten, die von der räumlichen Ausrichtung des Uhrwerks abhängt; der elektronische Steuerkreis (20) so beschaffen ist, dass sie mit einer elektrischen Energiequelle (30) verbunden werden kann; dadurch gekennzeichnet, dass der elektronische Steuerkreis (20) so beschaffen ist, dass sie das Anlegen einer elektrischen Spannung an die mindestens eine Elektrode steuern kann, um elektrische Antriebsimpulse für den Oszillator zu erzeugen, die ihn mit einer ausreichenden Energie versorgen, um eine funktionelle Schwingung dieses Oszillators für jede räumliche Ausrichtung des Uhrwerks mit einer zweiten Amplitude zu ermöglichen, die größer als ein maximaler Nennwert der ersten Amplitude für diese räumliche Ausrichtung ist.
  2. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass der elektronische Steuerkreis (20) so beschaffen ist, dass sie das Anlegen einer elektrischen Spannung so steuert, dass die zweite Amplitude für jede räumliche Ausrichtung des Uhrwerks und jede Aufzugshöhe des Federhauses im Wesentlichen konstant gehalten wird.
  3. Uhrwerk nach Anspruch 2, dadurch gekennzeichnet, dass der elektronische Steuerkreis (20) einen Spitzenspannungsdetektor (46) umfasst, der so beschaffen ist, dass er im Wesentlichen die Amplitude der induzierten Spannung in der piezoelektrischen Spiralfeder (16) erfassen kann, wenn der Resonator (12) schwingt, und eine Regelschaltung (20A), die von dem Spitzenspannungsdetektor ein Signal (SA) empfängt, das sich auf die Amplitude der induzierten Spannung bezieht, und die so beschaffen ist, dass sie eine Versorgungsspannung (VA) in Abhängigkeit von einem Sollwert (Sc) für das von dem Spitzenspannungsdetektor gelieferte Signal steuern kann, um eine Schwingung des Resonators mit einer im Wesentlichen konstanten Amplitude zu erhalten.
  4. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass die elektronische Steuerschaltung mit einem Quarzoszillator verbunden ist, der in diesem Uhrwerk enthalten ist, wobei die elektronische Steuerschaltung so eingerichtet ist, dass sie die elektrischen Antriebsimpulse mit einer spezifischen Versorgungsfrequenz erzeugt, die durch den Quarzoszillator bestimmt wird und von einer Sollfrequenz für den elektromagnetischen Oszillator (10) abhängt, die so konfiguriert ist, dass die Eigenschwingungsfrequenz somit für jede räumliche Ausrichtung des Uhrwerks und jede Aufzugshöhe des Federhauses in einem Wertebereich bleibt, der nahe genug an der Sollfrequenz liegt, um es den elektrischen Antriebsimpulsen zu ermöglichen, dem elektromechanischen Oszillator die Sollfrequenz aufzuzwingen und dabei eine funktionelle Schwingung mit der zweiten Amplitude zu haben.
  5. Uhrwerk nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die elektronische Steuerschaltung daher mit einem Quarzoszillator verbunden ist, der in diesem Uhrwerk enthalten ist, wobei die elektronische Steuerschaltung so angeordnet ist, dass sie die elektrischen Antriebsimpulse mit einer spezifischen Versorgungsfrequenz erzeugt, die durch den Quarzoszillator bestimmt wird und von einer Sollfrequenz für den elektromagnetischen Oszillator (10) abhängt, die so konfiguriert ist, dass die Eigenschwingungsfrequenz somit für jede räumliche Ausrichtung des Uhrwerks und jede Aufzugshöhe des Federhauses in einem Wertebereich bleibt, der nahe genug an der Sollfrequenz liegt, um es den elektrischen Antriebsimpulsen zu ermöglichen, dem elektromechanischen Oszillator die Sollfrequenz aufzuzwingen und dabei eine funktionelle Schwingung mit der im Wesentlichen konstanten zweiten Amplitude zu haben.
  6. Uhrwerk nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der maximale Nennwert für jede räumliche Ausrichtung des Uhrwerks kleiner oder gleich 300° ist und die zweite Amplitude für jede räumliche Ausrichtung des Uhrwerks und jede Aufzugshöhe des Federhauses größer als 300° ist.
  7. Uhrwerk nach Anspruch 6, dadurch gekennzeichnet, dass der maximale Sollwert zwischen 240° und 300° für eine beliebige räumliche Ausrichtung des Uhrwerks liegt und die zweite Amplitude zwischen 305° und 330° für eine beliebige räumliche Ausrichtung des Uhrwerks und eine beliebige Aufzugshöhe des Federhauses vorgesehen ist.
  8. Uhr (22) mit einem Uhrwerk (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Energiequelle in diese Uhr eingebaut ist und einen Stromgenerator umfasst, der so beschaffen ist, dass er eine externe Energie aufnehmen und in Elektrizität umwandeln kann, um eine Energieversorgung des elektronischen Steuerkreises (20) und der piezoelektrischen Spiralfeder (16) zu ermöglichen.
  9. Uhr nach Anspruch 8, dadurch gekennzeichnet, dass der Stromgenerator einen Lichtsensor umfasst.
  10. Uhr nach Anspruch 8, dadurch gekennzeichnet, dass der Stromgenerator eine Thermosäule umfasst, die so angeordnet ist, dass sie die Körperwärme eines Benutzers in Strom umwandeln kann.
EP21189581.8A 2021-08-04 2021-08-04 Uhrwerk mit oszillator, der eine piezoelektrische spiralfeder enthält Active EP4130890B1 (de)

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EP21189581.8A EP4130890B1 (de) 2021-08-04 2021-08-04 Uhrwerk mit oszillator, der eine piezoelektrische spiralfeder enthält
US17/804,667 US20230044830A1 (en) 2021-08-04 2022-05-31 Horological movement equipped with an oscillator comprising a piezoelectric balance-spring
JP2022101597A JP7402927B2 (ja) 2021-08-04 2022-06-24 圧電バランスばねを備える発振器を備える計時器用ムーブメント
CN202210903356.0A CN115705007A (zh) 2021-08-04 2022-07-27 配备有包括压电式游丝的振荡器的钟表机芯

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EP4099100A1 (de) * 2021-06-02 2022-12-07 The Swatch Group Research and Development Ltd Uhrwerk, das mit einem oszillator ausgestattet ist, der eine piezoelektrische spirale enthält

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JP3767388B2 (ja) 2001-01-30 2006-04-19 セイコーエプソン株式会社 圧電調速機およびこの圧電調速機を用いた電子機器
EP2561409B1 (de) 2010-04-21 2019-08-28 Team Smartfish GmbH Regelorgan für ein uhrwerk, und entsprechendes verfahren
EP2879111A4 (de) 2012-07-27 2016-10-19 Clarion Co Ltd Bildverarbeitungsvorrichtung
EP3540528B1 (de) 2018-03-16 2020-08-05 The Swatch Group Research and Development Ltd Uhr, die ein mechanisches uhrwerk umfasst, dessen ganggenauigkeit durch eine elektronische vorrichtung reguliert wird
EP3629103B1 (de) 2018-09-28 2021-05-12 The Swatch Group Research and Development Ltd Uhr, die ein mechanisches uhrwerk umfasst, dessen ganggenauigkeit durch eine elektronische vorrichtung reguliert wird

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EP4130890A1 (de) 2023-02-08

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